Search found 2724 matches

by Mike
Fri Mar 24, 2017 4:04 pm
Forum: Other Systems
Topic: VIC20 / C64 chargen
Replies: 10
Views: 112

Re: VIC20 / C64 chargen

With an adapter socket, a 2732 can be used as replacement character ROM, see the thread " Request help on replacing 2332 4Kx8 Char ROM -> Fixing a VIC ". However, the character ROM is not only used by VIC to display text screens with the standard font - the CPU also has access and there ac...
by Mike
Sun Mar 19, 2017 3:04 pm
Forum: Programming
Topic: Help converting numbers onto Char in ML
Replies: 7
Views: 175

Re: Help converting numbers onto Char in ML

Printing a number as decimal is more complex because you need to do successive divisions by ten. It is also possible to use the decimal mode of the 6502 to build up a number in BCD code from its binary representation and then use your example routine to print HEX numbers: http://6502.org/source/int...
by Mike
Fri Mar 17, 2017 7:22 am
Forum: Hardware and Tech
Topic: Ramdisk64 Cartridge... Looking for software for it
Replies: 11
Views: 189

Re: Ramdisk64 Cartridge... Looking for software for it

@orion70, @highinfidelity: So be it then. At least the notion that computer data storage need not necessarily be non-volatile (contrary to paper office files) should have occured to anyone at that time when the computer was switched off and didn't retain the type-in unless it was stored to tape or d...
by Mike
Fri Mar 17, 2017 4:13 am
Forum: Hardware and Tech
Topic: Ramdisk64 Cartridge... Looking for software for it
Replies: 11
Views: 189

Re: Ramdisk64 Cartridge... Looking for software for it

The advertised cartridge by far was not the only RAM disk that was available at that time. I'd suppose it was common knowledge then, that RAM disks are volatile unless explicitly stated so in the spec. They wrote "system reset" and not "power cycle" so I don't see any deviousness...
by Mike
Fri Mar 17, 2017 2:17 am
Forum: Hardware and Tech
Topic: Ramdisk64 Cartridge... Looking for software for it
Replies: 11
Views: 189

Re: Ramdisk64 Cartridge... Looking for software for it

I wonder what they exactly meant with "system reset" in the ad text. [...] :?: They mean the reset performed by any of those reset buttons available for the user port, IEC port, on a cartridge, (re-)triggered by the 555 timer on the mainboard, etc. A power cycle would of course clear the ...
by Mike
Tue Mar 14, 2017 9:34 am
Forum: Games
Topic: Work in progress: REALMS OF QUEST V
Replies: 144
Views: 2836

Re: Work in progress: REALMS OF QUEST V

Is Turbo-Disk the one that was published in COMPUTE!'s Gazette? Yes, that's the one. Be wary though, the first release had some bugs and there exists a second, bug-fixed release. Frankly put though, I wouldn't bother with any of these EasyLoad, Hypra-System or TurboDisk anymore. A user with a real ...
by Mike
Tue Mar 14, 2017 1:53 am
Forum: Games
Topic: Work in progress: REALMS OF QUEST V
Replies: 144
Views: 2836

Re: Work in progress: REALMS OF QUEST V

I was just thinking, since this game will access the disk drive quite a bit, is there is a fastloader that I can embed to my game? I'd use the version of SJLOAD that loads to $0400. That will work with any JD-enabled drive, including all SD2IEC variants. The other 'old-style' fast-loaders *) I know...
by Mike
Sat Mar 11, 2017 4:54 pm
Forum: Hardware and Tech
Topic: RS-232
Replies: 5
Views: 75

Re: RS-232

I want to build a RS-232 interface, but I don't know how to. Anyone know how or have any suggestions, [...] If you insist on +/- 12 V for the signal levels (because "TTL level" RS 232 wouldn't do), the schematics of the VIC-1011 VICModem are found here: ftp://ftp.zimmers.net/pub/cbm/vic20...
by Mike
Thu Mar 09, 2017 5:01 pm
Forum: Games
Topic: Work in progress: REALMS OF QUEST V
Replies: 144
Views: 2836

Re: Work in progress: REALMS OF QUEST V

You're probably right. I think I will lay off posting any new graphics here for a while. I do plan on having about 144 monster portraits on side 2 (the maximum number of files that you can place on a side of a Commodore floppy disk) along with portraits for people that you meet, boss monsters and t...
by Mike
Thu Mar 09, 2017 1:33 pm
Forum: Games
Topic: Work in progress: REALMS OF QUEST V
Replies: 144
Views: 2836

Re: Work in progress: REALMS OF QUEST V

beamrider wrote:perhaps you should keep the rest up your sleeve or the game won't hold any surprises...

+1 :)

I wouldn't mind having Meriel in my party. ;)

And Hazelwhisk bears a strong resemblance to Jude Law. :mrgreen:
by Mike
Thu Mar 09, 2017 1:28 pm
Forum: General Topics
Topic: VIC-20 software titles that shipped on diskette
Replies: 3
Views: 118

Re: VIC-20 software titles that shipped on diskette

That, and we shouldn't discount the software releases that have appeared in the Announcement section here in the last years. A good deal of them are not necessarily one-filers and therefore chose *.d64 as useful container format. IMO, that qualifies as disk release even if done outside the main comm...
by Mike
Thu Mar 09, 2017 7:36 am
Forum: Games
Topic: VIChaos
Replies: 18
Views: 453

Re: VIChaos

Next thing to do, if possible, user defined graphics! :D This was my thought... but after asking why PITFALL conversion needed more than the ATARI 4k, I was cautious as not to offend. Then you must have read something wrong into my reply at that time. My general assumption is, that there are no dum...
by Mike
Mon Mar 06, 2017 11:01 am
Forum: Programming
Topic: Maxi-/Uber-Edit
Replies: 34
Views: 1055

Re: Maxi-/Uber-Edit

BTW: Am using NTSC for a PAL telly and that's already clipping the corners. That's because the default register values for the horizontal and vertical position are already different for PAL and NTSC. If you program PAL values into an NTSC VIC, the display window is out of center, likewise the other...
by Mike
Sun Mar 05, 2017 1:13 pm
Forum: Collecting and History
Topic: Looking for PRG-files from Compute's programming the VIC
Replies: 13
Views: 206

Re: Looking for PRG-files from Compute's programming the VIC

The whole program 12-39 collapses into less than 10 lines of BASIC and also will be noticably faster when I use MG to (re-)implement it. Here's the result: upaint.zip 1 PRINT"GROUND,FORE,BORDER,AUX":INPUTG,F,B,A 2 POKE36878,16*A:POKE36879,16*G+8+B:POKE646,8+F:@ON:@CLR:S=1 3 GETA$:X=X+2*(A...
by Mike
Sun Mar 05, 2017 3:45 am
Forum: Collecting and History
Topic: Looking for PRG-files from Compute's programming the VIC
Replies: 13
Views: 206

Re: Looking for PRG-files from Compute's programming the VIC

I'll have a go at the listing 12-39 in the next days. For completeness, here we go: 12-39.zip 20 PRINT "BACKGROUND?";: GOSUB 50000: BA=G-1 22 PRINT "{4 SPACE}BORDER?";: GOSUB 50000: BO=G-1 24 PRINT " AUXILIARY?";: GOSUB 50000: AU=G-1 26 PRINT " CHARACTER?";: ...

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